From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-it0-f72.google.com (mail-it0-f72.google.com [209.85.214.72]) by kanga.kvack.org (Postfix) with ESMTP id C41286B0038 for ; Tue, 23 Aug 2016 21:30:36 -0400 (EDT) Received: by mail-it0-f72.google.com with SMTP id f6so11039605ith.0 for ; Tue, 23 Aug 2016 18:30:36 -0700 (PDT) Received: from mail-it0-x22b.google.com (mail-it0-x22b.google.com. [2607:f8b0:4001:c0b::22b]) by mx.google.com with ESMTPS id n13si7720673ioe.73.2016.08.23.18.30.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 Aug 2016 18:30:30 -0700 (PDT) Received: by mail-it0-x22b.google.com with SMTP id e63so182549387ith.1 for ; Tue, 23 Aug 2016 18:30:30 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20160824010415.GB27022@bbox> References: <1471854309-30414-1-git-send-email-zhuhui@xiaomi.com> <20160824010415.GB27022@bbox> From: Hui Zhu Date: Wed, 24 Aug 2016 09:29:49 +0800 Message-ID: Subject: Re: [RFC 0/4] ZRAM: make it just store the high compression rate page Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: Minchan Kim Cc: Hui Zhu , ngupta@vflare.org, sergey.senozhatsky.work@gmail.com, Hugh Dickins , Steven Rostedt , Ingo Molnar , Peter Zijlstra , acme@kernel.org, alexander.shishkin@linux.intel.com, Andrew Morton , mhocko@suse.com, hannes@cmpxchg.org, mgorman@techsingularity.net, vbabka@suse.cz, redkoi@virtuozzo.com, luto@kernel.org, kirill.shutemov@linux.intel.com, geliangtang@163.com, baiyaowei@cmss.chinamobile.com, dan.j.williams@intel.com, vdavydov@virtuozzo.com, aarcange@redhat.com, dvlasenk@redhat.com, jmarchan@redhat.com, koct9i@gmail.com, yang.shi@linaro.org, dave.hansen@linux.intel.com, vkuznets@redhat.com, vitalywool@gmail.com, ross.zwisler@linux.intel.com, Thomas Gleixner , kwapulinski.piotr@gmail.com, axboe@fb.com, mchristi@redhat.com, Joe Perches , namit@vmware.com, Rik van Riel , "linux-kernel@vger.kernel.org" , Linux Memory Management List Hi Minchan, On Wed, Aug 24, 2016 at 9:04 AM, Minchan Kim wrote: > Hi Hui, > > On Mon, Aug 22, 2016 at 04:25:05PM +0800, Hui Zhu wrote: >> Current ZRAM just can store all pages even if the compression rate >> of a page is really low. So the compression rate of ZRAM is out of >> control when it is running. >> In my part, I did some test and record with ZRAM. The compression rate >> is about 40%. >> >> This series of patches make ZRAM can just store the page that the >> compressed size is smaller than a value. >> With these patches, I set the value to 2048 and did the same test with >> before. The compression rate is about 20%. The times of lowmemorykiller >> also decreased. > > I have an interest about the feature for a long time but didn't work on it > because I didn't have a good idea to implment it with generic approach > without layer violation. I will look into this after handling urgent works. > > Thanks. That will be great. Thanks. Best, Hui -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org